<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./lib/vue.js"></script>
    <script src="./lib/vue-router.js"></script>
</head>

<body>
    <div id="app">
          <router-link to="/login">登陆</router-link>
        <router-link to="/register">注册 </router-link>
        <router-view>

        </router-view>

    </div>

    <script>
        var login = {
            template: '<h1>登陆</h1>'
        }
        var register = {
            template: '<h1>注册</h1>'
        }
        var router = new VueRouter({
            routes: [
                { path: '/', redirect: '/login' },
                { path: '/login', component: login },
                { path: '/register', component: register }

            ],
            linkActiveClass: 'myactive'  //和激活相关的类
        })
        var vm = new Vue({
            el: '#app',
            data: {

            },
            methods: {

            },
            router,
            watch: {
                //this.$route.path
                '$route.path': function(newVal, oldVal){
                    //console.log(newVal+'---'+oldVal)
                    if (newVal == '/login'){
                        console.log('欢迎进入登陆页面')
                    }else if(newVal == '/register')
                    {
                        console.log('欢迎进入注册页面')
                    }
                }
            },
        })
    </script>
</body>

</html>



<!-- 
    watch
    watch监听属性，如果属性发生变化，书写其他的逻辑发生改变
    computed 
    methods

    App.vue
    <keep-alive>
        <router-view/>
    </keep-alive>
 -->